Certified Rhythm Analysis Technician (CRAT) Practice Exam

Question: 1 / 400

What ECG finding is commonly seen in patients with bradycardia?

Shortened QT interval

Wide QRS complex

Increased heart rate variability

Prolonged RR interval

The presence of a prolonged RR interval on an electrocardiogram (ECG) is a key finding in patients with bradycardia. Bradycardia is defined as a slower than normal heart rate, typically fewer than 60 beats per minute in adults. This slow heart rate results in longer intervals between successive R waves on the ECG, which is reflected in the prolonged RR interval.

In this context, the RR interval measures the time between heartbeats, and when the heart rate decreases, it naturally extends this interval. Therefore, a prolonged RR interval provides evidence of the slower heart rhythm characteristic of bradycardia.

Understanding this relationship is essential for interpreting ECGs in clinical settings, particularly when diagnosing and managing conditions related to heart rate abnormalities.

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